My wife worked in a pub once, about 30 years ago, when grolsch was really popular with `yuppies'. Remember them? The landlord let her have as many bottles as she wanted as they didn't have a deposit on them. I'm still using them, though I recently had to replace the rubber seals on them which were a bit expensive, though if they last another 30 years that'll be a bit beyond my life expectancy... They take pressure fine, as good as any pressure bottle. I once bottled a bit before I should have done. There was so much pressure in there that I had to open the bottles one side of the sink, with the glass on the other side, and the whole contents shot over the sink and filled the glass. Not one bottle broke. I use a hydrometer nowadays!